Single Bournonite Crystal on Pyrite
Collection
John Betts - Fine Minerals
Description
Lustrous gray-metallic Bournonite crystals, repeatedly twinned, resulting in a classic cogwheel formation 12 mm across, on yellow-metallic Pyrite crystals to 2 mm.
Locality
Mina Machacamarca, Viboras section, near Colavi, Potosi, Bolivia
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